Anatomy of flowering plants neet pyq

All the following regarding the role of xanthophylls and carotenoids in photosynthesis are correct except: 1. They act as accessory pigments 2. Their peak absorption is in blue and red regions of VIBGYOR 3. They enable a wider range of wavelength of incoming light to be utilized for photosynthesis 4. They protect chlorophyll a form of photo-oxidation. Consider the situation where photosynthesis is going on at a steady pace in a typical experiment with a light on, and carbon dioxide is being combined with ribulose-bisphosphate (RuBP) to produce 3-phosphoglycerate (3PG). Then suddenly the source of carbon dioxide is eliminated. What changes in the concentrations of 3PG and RuBP would occur? 1. 3PG levels rise, RuBP levels fall. 2. 3PG levels fall, RuBP levels rise. 3. 3PG levels rise, RuBP levels rise. 4. 3PG levels fall, RuBP levels fall. Identify the statement that is true for C 4 plants but not for C 3 plants? 1. Initially fix carbon dioxide in mesophyll cells as 4-carbon long compounds. 2. Initially fix carbon dioxide in bundle sheath cells as 3-carbon long compounds. 3. Initially fix carbon dioxide in mesophyll cells as 3-carbon long compounds. 4. Initially fix carbon dioxide in bundle sheath cells as 4-carbon long compounds. Crops such as tomatoes and bell pepper, allowed to grow in a carbon dioxide rich environment, show higher yields because: 1. They show an increased rate of photosynthesis at higher carbon dioxide concentrations. 2. They can respond to high carbon d...